I recently purchased a home built in 1961. Believe it or not, I love the pink bathroom, but, sadly, need to remove tiles in order to repair water damage behind them. I had someone come out and give me an estimate. He told me I would need to try to find replacements. Seems that I will get nowhere until I identify the manufacturer, etc. I have 2 spares, found in the basement. They are 4.25" x 4.25", pink (as I mentioned) and, on the back, they are stamped "AMERICAN 18" on one and "AMERICAN 19" on the other, near the top, "MADE IN USA" near the bottom, and along the left side, "PAT APL'D FOR". In the middle of each tile, there's an ink stamp that I can't make out. Looks like maybe an "A", then two sets of letters or numbers (very smudged).
Any help or info would be greatly appreciated!